STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Proceeds from Issuance of Common Stock	$ 2,536	$ 2,390
Operating activities
Net income	135,587	127,530
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	134,260	118,991
Deferred income taxes	9,099	36,637
Share-based compensation expense	7,153	6,195
Provision for doubtful accounts	4,600	6,758
Changes in assets and liabilities:
Accounts receivable	160,053	159,574
Materials and supplies	(12,455)	(691)
Natural gas in storage	(11,155)	3,673
Asset removal costs	(38,101)	(39,195)
Accounts payable	(113,665)	(63,857)
Accrued taxes other than income	(435)	7,436
Customer deposits	(3,652)	758
Regulatory assets and liabilities	20,196	100,268
Other assets and liabilities	(2,942)	(27,309)
Cash provided by operating activities	288,543	436,768
Investing activities
Capital expenditures	(305,797)	(279,346)
Other	(4,056)	0
Proceeds from Sale of Other Assets, Investing Activities	1,036	0
Cash used in investing activities	(308,817)	(279,346)
Financing activities
Repayments of notes payable, net	95,500	(81,215)
Dividends paid	(79,055)	(72,432)
Tax withholdings related to net share settlements of stock compensation	(7,468)	(8,148)
Cash used in financing activities	11,513	(159,405)
Change in cash and cash equivalents	(8,761)	(1,983)
Cash and cash equivalents at beginning of period	21,323	14,413
Cash and cash equivalents at end of period	$ 12,562	$ 12,430